I have seen many webmasters still using PBN and ranking sites like there is no other day. It's all about you to manage to hide your sites from Google. There are so many people offering PBN as a service, so it is still effective for them.

Google is starting to action against those networks...
They are considered not to be "white hat"...

Hi,

I would like to know that if PBN and guest posting are not working and Google take action on those types of activities then which are most effective link building method that Google can;t take wrong action and boost out our SERP.

I would like to know that if PBN and guest posting are not working and Google take action on those types of activities then which are most effective link building method that Google can;t take wrong action and boost out our SERP.